HappyHorseImageToVideoApi - ComfyUI Built-in Node Documentation - ComfyUI

This node generates a short video from a single starting image using the HappyHorse model. You provide a first frame image and a text prompt describing the desired motion and scene, and the node creates a video that continues from that image.

Inputs

Common Inputs

Parameter	Description	Data Type	Required	Range
`model`	The HappyHorse model to use for video generation.	DYNAMIC_COMBO	Yes	`"happyhorse-1.1-i2v"` `"happyhorse-1.0-i2v"`
`first_frame`	First frame image. The output aspect ratio is derived from this image.	IMAGE	Yes	300×300 px min; 1:2.5 to 2.5:1
`seed`	Seed to use for generation. (default: 0)	INT	Yes	0 to 2147483647
`watermark`	Whether to add an AI-generated watermark to the result. (advanced option; default: False)	BOOLEAN	Yes	True / False

happyhorse-1.1-i2v and happyhorse-1.0-i2v Inputs

Both model versions share the same set of parameters.

Parameter	Description	Data Type	Required	Range
`prompt`	Prompt describing the elements and visual features. Supports English and Chinese. (default: "")	STRING	No	N/A
`resolution`	The output video resolution. (default: `"720P"`)	COMBO	Yes	`"720P"` `"1080P"`
`duration`	The duration of the generated video in seconds. (default: 5)	INT	Yes	3 to 15

Note: The first_frame image must be at least 300x300 pixels, and its aspect ratio must be between 1:2.5 and 2.5:1.

Outputs

Output Name	Description	Data Type
`video`	The generated video file.	VIDEO

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